Computer NetworksComputer networks link computers by communication lin dịch - Computer NetworksComputer networks link computers by communication lin Trung (Phồn thể) làm thế nào để nói

Computer NetworksComputer networks

Computer Networks
Computer networks link computers by communication lines and software protocols,
allowing data to be exchanged rapidly and reliably. Traditionally, networks have been split
between wide area networks (WANs) and local area networks (LANs). A WAN is a network
connected over long-distance telephone lines, and a LAN is a localized network usually in
one building close together. The distinction, however, is becoming blurred. It is now possible
connect up LANs remotely over telephone links so that they look as though they are a single
LAN.
Originally, networks were used to provide terminal access to another computer and to
transfer files between computers. Today, networks carry e-mail, provide access to public
databases and bulletin boards, and are beginning to be used for distributed systems. Networks
also allow users in one locality to share expensive resources, such as printers and disk-systems.
Distributed computer systems are built using networked computers that co-operate to
perform tasks. In this environment each part of the networked system does what it is best at.
The high-quality bit-mapped graphics screen of a personal computer or workstation provides
a good user interface. The mainframe, on the other hand, can handle large numbers of queries
and return the results to the users.
In a distributed environment, a user might use his PC to make a query against a central
database. The PC passes the query, written in a special language (e.g. Structured Query
Language – SQL), to the mainframe, which then parses the query, returning to the user’s PC only
the specific information requested, network traffic is reduced. If the whole file was transmitted,
the PC would then have to perform the query itself, reducing the efficiency of both network
and PC.
In the 1980s, at least 100,000 LANs were set up in laboratories and offices around the
world. During the early part of this decade, synchronous orbit satellites lowered the price of
long-distance telephone calls, enabling computer data and television signals to be distributed
more cheaply around the world. Since then, fibre-optic cable has been installed on a large scale,
enabling vast amounts of data to be transmitted at a very high speed using light signals.
The impact of fibre optics will be considerably to reduce the price of network access.
Global communication and computer networks will become more and more a part of
professional and personal lives as the price of microcomputers and network access drops. At the2
same time, distributed computer networks should improve our work environments and technical abilities
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Kết quả (Trung (Phồn thể)) 1: [Sao chép]
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電腦網路電腦網路連結電腦通過通信線路和軟體協定允許快速而可靠地交換資料。傳統上,網路已經被拆分之間的廣域網路 (Wan)、 局域網 (Lan)。灣是一個網路在長途的電話線路,連接和 LAN 是在通常的當地語系化的網路一樓靠在一起。區別,然而,是變得模糊不清。它現在是可能了局域網遠端連線在電話聯繫使它們看起來好像他們是單身局域網。原來,用網路來提供終端接入到另一台電腦,在電腦之間傳輸檔。今天,網路進行電子郵件,提供對公共訪問資料庫和電子公告板,並開始用於分散式系統。網路此外允許使用者在一個地方共用昂貴的資源,如印表機和磁片系統。分散式的電腦系統是使用共同去經營的聯網的電腦生成執行任務。在這種環境網路化系統的每個部分做它是最擅長。提供了高品質點陣圖圖形螢幕的個人電腦或工作站良好的使用者介面。大型機,另一方面,可以處理大量的查詢並將結果返回給使用者。在分散式環境中,使用者可能使用他的 PC,使對中央的查詢資料庫。PC 將傳遞查詢,寫在一種特殊的語言 (如結構化查詢語言 — — SQL),到大型機,然後解析查詢,返回到使用者的 PC 僅具體資訊要求,減少了網路通信量。如果整個檔被傳輸,PC 將不得不執行查詢本身,減少這兩個網路的效率和 PC。在 20 世紀 80 年代,至少 100,000 局域網建立了實驗室和在各地的辦事處世界。在這十年的早期階段,同步軌道衛星的價格降長途電話,啟用電腦資料和電視信號分發更便宜環游世界。自那時以來,光纖電纜已安裝在規模較大,使大量的非常高的速度使用光信號傳輸的資料。纖維光學的影響會大大降低網路訪問的價格。全球通信和電腦網路將成為越來越多的一部分職業生活和個人生活作為微型電腦和網路訪問滴的價格。在第 2同一時間,分散式運算機網路應該提高我們的工作環境和技術能力
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Kết quả (Trung (Phồn thể)) 2:[Sao chép]
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計算機網絡
的計算機網絡連接的計算機通過通 ​​信線路和軟件協議,
使數據能夠迅速且可靠地交換。傳統上,網絡已經分裂
廣域網(WAN)和局域網(LAN)的之間。廣域網是一個網絡
連接上的長途電話線路和局域網通常是在一個局部的網絡
一棟樓靠在一起。的區別,但是,是變模糊。現在可以
遠程連接了局域網通過電話聯繫,讓他們看起來好像他們是一個單一的
局域網。
最初,網絡被用來提供終端接入到另一台計算機和
計算機之間傳輸文件。今天,網絡所承載的電子郵件,提供訪問公共
數據庫和電子公告牌,並開始用於分佈式系統。網絡
還允許用戶在一個地區共享昂貴的資源,如打印機和磁盤系統。
分佈式計算機系統使用的是聯網的計算機共同操作以建立
執行任務。在這種環境下的網絡系統的每個部分做什麼,最好在。
在個人計算機或工作站的高品質的位映像圖形屏幕提供
良好的用戶界面。大型機,另一方面,可以處理大量的查詢
並返回結果給用戶。
在分佈式環境中,用戶可能使用他的PC,使與中心的查詢
數據庫。在PC將查詢傳遞,寫在一個特殊的語言(例如,結構化查詢
語言- ,SQL),到主機,然後解析該查詢,返回到用戶的PC只
請求的特定信息,網絡流量減少。如果整個文件傳輸
,PC 機將不得不執行查詢本身,同時降低網絡的效率
和PC。
在20世紀80年代,至少100,000個局域網分別設立在各地的實驗室和辦事處
的世界。在這十年中的早期,同步軌道衛星下調價格
的長途電話,使計算機數據和電視信號分發
更便宜地在世界各地。自那時以來,光纖電纜已被安裝在大的規模,
使大量以非常高的速度使用的光信號,以被發送的數據。
光纖的影響將大大減少的網絡接入的價格。
全球通信和計算機網絡將成為越來越多的一部分
專業和個人生活的微型計算機和網絡訪問滴的價格。在THE2
同時,分佈式計算機網絡應該改善我們的工作環境和技術能力
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Kết quả (Trung (Phồn thể)) 3:[Sao chép]
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電腦網絡、電腦網絡、電腦網絡、通信線路和軟件協定,允許數據快速、可靠地進行資料交換。傳統上,網絡已經分裂
廣域網(WAN)之間,局部區域網絡(LAN)。廣域網是一種網絡連接的長途電話線,一個局域網通常是在一個建築物附近的一個區域網路。然而,區別變得模糊。現在可以用電話連接局域網,使他們看起來像是一個單一的局域網。原來,網絡被用來提供另一臺電腦的終端訪問,並在電腦之間傳輸文件。今天,網絡進行電子郵件,提供訪問公共資料庫和公告板,並開始被用於分佈式系統。網絡還允許用戶在一個地方共亯昂貴的資源,如打印機和磁片系統。使用網絡的電腦來執行任務,構建分佈式電腦系統。在這樣的環境中,網路系統中的每個部分都是最好的。個人電腦或工作站的高品質比特映射圖形荧幕提供了一個良好的使用者介面。主機,另一方面,可以處理大量的査詢,並返回到用戶的結果,在分佈式環境中,用戶可以使用他的個人電腦,對中央資料庫的査詢。電腦通過査詢,用一種特殊的語言(如結構化査詢語言–SQL),到主機,然後分析査詢,返回到用戶的電腦,只
具體資訊的要求,减少了網路流量。如果整個檔案被傳輸,那麼個人電腦將不得不執行査詢本身,减少了網絡的效率和PC。20世紀80年代,至少有100000個局域網建立在實驗室和辦公室的世界各地。
đang được dịch, vui lòng đợi..
 
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